On Saturday night, the 30th of August, Ferguson solidarity marchers
assembled at Union Station, then marched on H Streen NE, shutting it
down for over two hours. Cops were blocked from hassling stragglers and
many bystanders joined the march. Eventually the march grew to a length
of about two blocks of people taking the whole street.
Video clips taken from "DC Solidarity by Stream" Ustream coverage posted by "Gen Knox"